Ceiling heater and ventilator



Sept. 21, 1954 Filed Feb. 10 195] J. R. CORBETT CEILING HEATER ANDVENTILATOR 3 Sheets-Sheet 1 INVENTOR.

146M WWL,

A T OKA/EYS.

Sept. 21, 1954 J. R. CORBETT 2,689,906

CEILING HEATER AND VENTILATOR Filed Feb. 10, 1951 s Sheets-Sheet 2INVENTOR.

.?9' BY W razm Sept. 21, 1954 CQRBETT 2,689,906

CEILING HEATER AND VENTILATOR Filed Feb. 10, 1951 5 Sheets-Sheet 3 IN VEN TOR.

W45 flwM. ZUZ-wl, 74 64 444 A TTOCNE Y5.

Patented Sept. 21, 1954 CEILING HEATER AND VENTILATOB- Joseph R;Corbett, Cincinnati, Ohio, :assignor'to Nu Tone, Inc., Cincinnati, Ohio,a corporation .Of Ohio Application February 10, 1951, Serial'No. 210,422

11 Claims. 1

This invention relates to: a combination heater and a rcirculatoradapted to, forcibly project -a stream of warm air downwardlyfrom the ceiling of arroom for, a substantial distance so that thetemperature ofthebccupied space or lower portion of the roomrmay beelevated in a rapid and convenient manner.

The principal object of this invention is to provide a ceiling .heaterwhich will supply heat to the ,lower portions ,of a room promptly afterthe heater has been turned ,on. Heaters of the present invention .areparticularly adapted for use ,in bathrooms or dressing rooms where theoccupants are likely to be thinly clad, .and where it is necessary, fortheir comfort, to :raise the temperature above that normally prevailing.On

chilly mornings for instance when .a partially clad individual enters acold bathroom, he needs immediate additional heat,.espe cially about hislegs and feet. A heater of the present. invention is constructed .topromptly supply the additional heat which is needed, by forcinga columnof warm air ,downwardls to within a short distance of the floorlevel'where it can circulate about the occupant of the room.

The significance of thisobject can be better understood from aconsideration of the problems which are inherent in any attempt tosupply heat from the ceiling .of a room to the floor thereof within aminimum time after the heater has been turned on.

If a radiant electric heater -mounted in the ceiling is used as thesource of heat, a considerable period of time elapses before thetemperature of the heating elementisraised sufiiciently to give'oif anappreciable quantity oi'heat. Furthermore, .a radiant heater is largelyineffective to warm those-parts of the occupants body which were notexposed'to thedirect heat rays; thus only the head and shoulders Wouldbe benefited 'byithe heater while the feet and legs remain uncomfortablycold.

Nor can a satisfactory heating unit be constructed by merelymounting aconventional fan above an electricrheating c,oil,to force a stream ofair over it, sinceaconventional fan tends to diffuse air laterallyalongthe ceiling or direct it downwardly at only a small velocity, withthe result that in either case the warm air does not reach "that part ofthe room where it can be felt by the occupant. Hence, until the warm airhas had time to diffuse slowly into the room, the occupant receives nobenefit from the'heater.

It has been determined that these difficulties may be successfullyovercome by a compact heater unit having an axial flow fan which takesair in through an inlet passageway, reverses its direction of flow andforces it over a heating coil through an outlet passageway from which itis discharged at a relatively high velocity in a defined path. 'A columnof air is thus projected a considerable distance from the heater unitinto the room, after overcoming not only the resistance to flow of theheater unit itself, but also whatever resistance is offered by the massof warm air rising from the lower regions of the room toward theceiling.

The ceiling heater of the present invention is adapted to reside in .arecess in the ceiling, flush with the ceiling surface, an arrangementwhich greatly enhancesthe attractiveness of the installed unit,b.utimposes several additional limitations upon the heater and fanconstruction. A heater which is to be mounted'in'the ceiling must becompact, for it ordinarily must fit between the joists, headers andother structural members. Additionally, due to the difficulty inreaching the unit, it is highly desirable that the heater constructionbe of such a nature that the unit can. be readily disassembled and thevarious component parts removed for any needed repairs or cleaning.

The presentyinvention briefly contemplates a compact heaterunitcomprising concentric cylinders or shells, which'may 'bedesignatedan outercasing, an inner baflle tube, and a divider vsleeveadisposedintermediate thecasing and the baffle tube. The upper end of the dividersleeve is'spaced downwardly from the top of the housing as in the innerbaflle tube. A motordriven fan is so mounted that the fan blade armsrotate within thecasing above the upper end of the baffle tube, whileangulated fan blades, secured to the ends of the arms, rotate in theannular space between the baffle tube and divider sleeve. The spacebetween the divider sleeve and outer casingis unobstructd and serves asthe air intake portion of the'unit.

Thus, air enters the inlet space between the housing and divider sleeveand moves upwardly but is then forced by the rotating fan blades toreverse its-direction of how and move downwardly through the annulardischarge. space between the divider sleeve and baflle tube. An electricheating coil is utilized to heat the air circulated by .the'fan;preferably the heater is disposed within the annular space defined bytheinner baffle tube and divider sleeve so that as the air isforceddownwardly through that space, it becomesheated beforebeingejected from the unit.

In the preferred construction, the shells serve as supports for themotor, heating element, and grill work, as well as forming the inlet andoutlet passageways for the air. Consequently, the heater and ventilatormay :be built as a small,

compact unit in which the motor and heating coil are disposed entirelywithin the air passageways, and, when the unit is to be disassembled forcleaning or repairing, disassembly is accomplished simply by removingthe two inner shells as a unit without the necessity of disengaging aplurality of structural members.

It will be noted that the air passes downwardly through the annularspace containing the fan blades which are secured to the ends of theblade arms. Since the fan blades extend outwardly from the end of thefan blade arms the entire blade surfaces move at high linear velocity,as a result the air stream enters the room at high initial velocity. Thevelocity imparted by the blades to the air is adequate to force a shaftof warm air a considerable portion of the distance from the ceiling tothe floor and consequently the lower portions of the room surroundingthe occupant are furnished with warm air as soon as the fan is turnedon. However, when a fan blade is rotated within a shell or cylindricaltube, the axial movement of the air through the tube is much less thanwould normally be expected because of the tendency of the air to rotatewith the fan blade rather than be propelled axially by it. To minimizethe whirling tendency of the air as it is forced axially by the fan, thecentral section of the discharge passageway in the preferredconstruction is blocked by the baille tube, and additionally,straightening vanes are provided in the discharge passage to direct theair in a straight or predetermined downward course. The vanes, bafiletube and divider sleeve thus cooperate to produce a velocity stream ofair which is directionally guided and which is substantially free of anyundesirable swirling tendency. Near the end of its downward travel, theair spreads laterally over the lower regions of the room and hence theentire room is supplied with additional heat.

The invention further contemplates the installation of an electric lightbulb and socket within the baffle tube, in order that the heating unitmay constitute a lighting fixture for the room as well as a ventilatingand heating appliance. Only one opening need be made in the ceiling andone outlet box provided for the heater unit and lighting fixtureelectrical connections.

An additional object of this invention is to provide a heater andventilating unit which is adapted for use with a discharge duct so thatthe unit may be selectively used as either a heater or as an exhaustventilator.

These and other advantages of the present invention will be apparentfrom further consideration of the following detailed description of thedrawings in which a typical embodiment of the invention is disclosed.

In the drawings:

Figure 1 is a vertical cross sectional view of the heater unit.

Figure 2 is a bottom view of the unit with the grill and fan bladeomitted.

Figure 3 is a cross sectional view taken along line 33 of Figure 1.

Figure 4 is a bottom view of the unit.

Figure 5 is a partial vertical cross sectional view of a modification ofthe heater unit adapted for exhaust ventilation.

Generally, the heater unit comprises a housing I0 which may becylindrical for economy of manufacture and which, in any event, isadapted to fit into a recess in the ceiling I I of a bathroom, dressingroom or the like. Disposed within and preferably spaced concentricallyor evenly from the casing are a bafile tube I2 and a cylindrical dividersleeve I3. The divider sleeve I3 carries motor mounting brackets I4which support a motor I5 above the baffle tube I2. The motor is providedwith a vertically disposed shaft I6 carrying horizontally rotatable fanblade arms I! having angulated blades I8 secured at their outer ends.The blades are disposed near the top of the annular space 20 between thebafiie tube I2 and divider sleeve I3; also disposed within this spaceare an electric heating element 2|, and the air directing vanes 22. Alight socket 23 and bulb 24, which may be operated independently of theheater unit are mounted within the baille tube I2, and a light diffusinglens 25 is provided over the lower baffle tube opening. The baffle tubeI2 is sealed at the bottom by the lens 25 so that no air may passdownwardly through the tube.

In operation of the unit, air is drawn upwardly through the outerannular space 26 formed between the housing I0 and divider sleeve I3.Upon reaching the top of the heater unit, the direction of air flow isreversed, and the air is now forced downwardly by the fan blades I8through the inner annular space 20 intermediate the baflie tube I2 anddivided sleeve I3. During its downward travel through the inner annularspace 20, the air passes over the electric heater coil 2I and. is warmedbefore being ejected downwardly into the room.

It will be noted that all of the air passing through the unit is forceddownwardly through the annular discharge space 20. The narrow fan bladesI8 rotating in this space 20 are rotating at a relatively high linearvelocity since they extend outwardly from the ends of the fan blade armsI]. The air is thus given a relatively high velocity, which is sumcientto overcome the friction encountered in the heater and to cause the airto carry downwardly a substantial distance from the ceiling toward thefloor. The tendency of the air to swirl and diffuse laterally, ratherthan pass in a straight shaft or column downwardly, is eliminated by theprovision of the sealed baflle tube I2 which blocks any air passagearound the central portion of the fan, and the air directing vanes 22which are vertically disposed in the air stream to guide the air alongthe path which they delineate.

In specific detail, the housing shown in the drawings comprises acylindrical shell II) hav ing a circular plate 21 enclosing its top. Anopening 28 is provided in the housing wall to communicate with an outletbox 30 for the electrical connections necessary for the light 24,electric heater 2|, and fan motor I5 of the unit. The lower edge of thehousing II] is provided with an outwardly turned rim 3| or flange whichresides in flush engagement with the ceiling II. A plurality of ceilingmounting lugs 32 are secured to the housing I0 for mounting the unit ina ceiling recess by joining the lugs to joists, headers or otherstructural members. A plurality of louver mounting lugs 33 are securedto the outwardly turned rim 3| by spot welding or other similar means.

The divider sleeve I3 is disposed inwardly of the housing ID, inconcentric arrangement therewith, and is removably joined to thehousing, To secure a jointure between the housing I I] and dividersleeve I3, a plurality of inwardly turned feet 34 are secured to theinner housing wall, as by rivets 35, Each of the feet 34 is providedwith a threade'd opening: 3'8 adapted? to 3 receiver a ibolt. 31.Similarly, outwardly turned; feet 381 are: joined to the dividersleeveI31 as by! rivets Mi, which feetare-alsoprovided with the2' threaded:apertures 4 adapted to: receivebolts 4-2. The: divider sleeve [3 isinserted into the housing; it; first rotating the sleeve untilitheieett34c and 3.8.1 associated withthe housing and: sleeve" are out ofalignment, then raising the sleeve: untilithe. feet 38 secured to thesleevev aretr: disposed above: the feet 34 secured to the-Lhousing,thenzrotating the sleeve until thetwo: sets of. feet are broughtintoengagement. whereupon they; are secured-in place by means ofsboltszfl.

The motormounting brackets M: are? secured: tothe divider sleeve I 3 by.means" of. bolts: 43': The brackets support the moton. l5; above; thebafii'e tube 12; with the.motorishaft"vertically disposed in coincidencewith. the. housing. axis: A. plurality of fan bladetarins are joinedltoacollar implaceby a set. screw or'ssimila'rtmeans-.-v The arms I?! areprovidediiwith angulatedifanbladesr [8, either made integraliwithithe:arms 01: joined; thereto. The fan blades I8;.whichmotaterintthe: upperportion of the annular. discharge space, intermediate the baffle tube.l2: and. divider sleeve Iii-i are preferably curved in" order. to:achieve the best-aerodynamic results.

The cylindricalbaffleitubel2' resides". inwardly of the divider. sleeve13 and is: joined" thereto'by a': plurality of air directing. vanes 22'which are welded or otherwisesecured'to the: inner wall of the:div-idersleeve and outer: wall of the bafiie tube;- Preferably, the air.vanes 22- are: radially disposed relative to the housingtaxislandraresubstantially vertical. Their. function is; to reduce the" swirlingtendenciesimparted to the air: by. the rotation of the fan blades.- Thetop edge of thebaflie'tube [2- is disposed at substantial distance belowthe top of the divider: sleeve lib-while the: bottom edge'of thetube'extend's below thedivider' sleeve andihousing.

A strap ls having upwardly turned endiportions 4 is-weldedor otherwisesecured" to the. upper' end of'the baflie tube [2, anda: lamp socket 233is-bolt'ed to this strap, with electric leads-extending-f-rom the socketthroughan opening 28 in the' housing to the outlet box 30. A lamp bulb24 is-= fitted into the'socket 23' and resides completely: within thewell formedby the baffle tub'e it; A len's 25' is heldagainst the loweredge of the baffie tube by a ring 4% which is bolted to thebaflle'tube'l z and' which is providedwithan inwardly turned rim Ell-which overfitsa lipi-l'provided onthe'cir-- cumference of the lens.

Aicircular'band 52', which supportsthe heating element 21, fits over thelower section of the divider sleeve l3. The ban'd'52- is secured inposition by a. plurality of. angle members 53 which arewelded orotherwise secured-to the band- 52 and bolted to the feet 382associatedwith the divider sleeve I3; A plurality of vertically disposedbrackets 54; each havinga relatively wide: shallow'notch 55' formedalongzitseupperedge are" secured interiorly of the band 52.

Circular electricresistance heating element 25 rests in the notches andis. clamped in position. between thebrackets 5'4 and the-loweredgesofthe'vanes 22. The electric resistance heating elementzl may beconstructed from anelectric resi'stan'ce wire suitably encased;- inametallic tube. Sucha heating. element has theadvantagesthat there may bemetallic contactbetween the" e1e-- ment and structural members Withoutcausing a outlet box 3!].

' the" heating: element by permitting horizontal movement oft the coilwhilefirmly clamping it" against"thewvanes totprevent its vertical.movement'.. The resistance heating element is connected: by: twoconductors 56-5"l' to terminals The/motor leads. 6'|62 are alsoconnected to terminalsfiaiand fifl while the voltage supply line.isconnected:acrossxterminals 581 and 63' through leads .64657 joining"the terminals. 58, es and? the. A fusible link 66 connects. terminalsfilliandifii; Thus, theifusible link 66; which is adapted: to. melt ifjsafeoperating temperature i's'exceeded, .is placedinboth theheatinggcoil andmotor energ-ization circuit so that it the motorshouldcfail. while the heating element iszturned on,thetfusiblelink.willmelt, and thereby inter' rupt: the circuit tov boththemotor and heating. coil before fire-roanv occur.

portion: of the band 52 extends below the 5 loweredgerof the dividersleeve and is adaptedto carry the grill 61; The. grill 51, which fitsover the lower end. of the-discharge passageway, is formed from aplurality of concentric circular strips- 68- j oinedas by welding toresilient stringers- 10. Theresilient' stringers it have short bent;end. portions H adapted to reside in apertures. provided-in-thebandso-lthat the grill may be snapped into place by. aligning the endportions with the apertures andallowingthe stringers to. expandoutwardly. A plurality of horizontally disposed louvers T2 are joined toframe members 13 as by welding. The uppermost louver M which abuts theceiling I I, is bolted to a plurality of lugs 33., securedto the lower.rim 310i. the.housing ID by. meansof boltsv 15.

If it-should. become necessary to remove the unit. after it hasbeeninstalled, the louvers 14. may; beremoved by loosening the bolts 15 andthe feet Stand 38 securing the divider sleeveand baiiie tube disengagedby removing the bolts 31'. This permits the divider sleeve l3, bailietube [2, motor [5, and heating element 2| to be removed as a unit forrepairs and cleaning. Access to the light bulb 2c is obtained merely byremoving the grill I51. This can be accomplished by compressing thestringers iii to disengage them from the apertures in the band 52. Thelens 25 may be removed by loosening the bolts I6 and releasing the ring88 which holds the lens against the baflie tube. The heating element 2|may be reached by disengaging the angle members 53 andv feet 38 byremoving bolts 42. This. permits the band 52 to be withdrawn and" x withitthe heating element support brackets 54.

To reassemble the unit, it is necessary only to slip the band 52 overthe divider sleeve 53 and raise it. upwardly until the heating element2| is clamped between the brackets 54 and vanes 22; The band 52' is thensecured in place by tightening bolts 42'and the grill 6'! is replacedbyinserting thestringers 10 supporting the grill in the apertures providedin the band 52.

When'the heating element ill and motor l5 are energized, cool air isdrawn between the louvers T4 into the inlet passageway 26- formedbetween thedivider sleeve 13 and housing it; The airpasses over the topof the-dividersleeve H! where its-direction of flow is reversed and itis forced downwardly by the fan blades l8- through. the dischargepassage' 20 defined by the divider sleeve l3 and baffle tube I2. The airflow in the discharge passage 20 is directed in a straight pathdownwardly by the air directing vanes 22. The air is heated by contactwith the heating coil 2| before it is discharged downwardly through thegrill 61. The baflle tube l 2 forming the inner wall of the dischargespace 20 is sealed by the lens 25 and ring 48 so that no air can passdownwardly through the interior of the tube and as a result an annularshaft of air is discharged into the room. Due to the high velocity ofthe air, this shaft extends almost to the floor level and is effectiveto transfer the heat supplied by the electric coil directly to theoccupants of the room.

In the modification shown in Figure 5, the heating unit shown generallyat 80 is provided with a reversible motor which may be controlledindependently of the heating element. ihe top of the housing BI is leftopen and communicates with a duct 82 which discharges to the roof. Adamper arrangement indicated at 83 may be provided in the duct to governthe flow of air therethrough. A ceiling unit so constructed is adaptedfor use either as a heating unit or as an exhaust ventilating unit. Inthe latter case, the direction of rotation of the motor is reversed fromthat normally used and the air is drawn upwardly through the annularpassages and is forced into the duct 82 by which it is discharged to theair. When the unit is so operated, it is desirable that the heatingelement not be energized, hence separate control means are provided forthe motor and heating element. When the unit is to be used for heatingagain, the damper 83 is closed, sealing the unit from the outside air,and the motor is reversed to force warm air downwardly as before.

Obviously, my invention is susceptible to many other modifications suchas relocation of the heating element and the like which will be apparentto those skilled in the art. Therefore, I desire to be limited only bythe following claims.

I claim 1. A ceiling heater unit comprising a housing, a baiile tubedisposed interiorly of said housing, a divider sleeve disposedintermediate t; e baiiie tube and said housing, said divider sleevebeing spaced downwardly from the top of said housing, a fan, said fanhaving a plurailty of radially extending arms, a fan blade mountedadjacent to the end of each of said arms, said blades being disposedintermediate the baffle tube and divider sleeve, a heating element, saidheating element being disposed in a space defined by said ba'file tubeand said divider sleeve, said baffle tube being closed at at least oneend to prevent the flow of air therethrough whereby the effec tive toforce the air between the baffle tube and divider sleeve forming acolumn of air flowing downwardly from said heater into a room.

2. A ceiling heater comprising a cylindrical housing, a baffle tubedisposed interiorly of and connected with said housing, a divider sleevedisposed intermediate the housing and said baffle tube, a fan having aplurality of blades adapted to rotate intermediate the baffle tube anddivider sleeve, said baffle tube having a light socket secured to theinterior thereof, a lens positioned below said baffle tube in abutmenttherewith, said lens being adapted to transmit light but prohibit thepassage of air through said baffle tube whereby the fan is effective toforce the air between said bafile tube and said divider sleeve therebydischarging an annular column of air downwardly into the room.

3. A device for furnishing a high velocity stream of warm air,comprising annular tubes arranged in spaced substantially concentricrelation to one another, the outermost one of said tubes constituting ahousing, the innermost of said tubes being closed to constitute abaffle, and the intermediate one of said tubes constituting a dividerdelineating an intake passage between it and the outermost tube, and adischarge passage between it and the innermost tube, a fan supportedfrom said housing and having blade members communicating with, thedischarge passage at one end thereof, an electric heating coil disposedWithin the discharge passage at an opposite end thereof a plurality ofspaced air directing vanes disposed within said discharge passagewayintermediate said fan and said heating coil, and the said outlet passagebeing in communication with the inlet passage within said housingwhereby operation of said fan is effective to induce the flow of airthrough the inlet passage and forcibly project the air thorugh theoutlet passage over said heater.

4. A fan and air heater unit adapted for installation at the ceiling ofa room, comprising tubular members substantially concentrically arrangedone within another in spaced relationship, the outermost tubular memberconstituting a housing which is adapted to be recessed in the ceiling ofa room, a motor mounted at the end of the next inward tube within saidhousing and having a fan blade operable within the said next inwardtube, the innermost tube of the series being disposed beneath said fanand being closed against the flow of air, the space between the housingand the next inward tube constituting an air inflow passageway, thespace between the said next inward tube and the innermost tubeconstituting an air outlet passageway, a plurality of air directingvanes arranged in the air outlet passageway, each of the said vanesbeing fastened to the intermediate tube member, and the said innermosttube member being supported upon the inward portions of said vanes, thesaid air inlet and outlet passageways being in communication with oneanother within said housing above said fan blades, and an electricheating coil arranged in the air outlet pasageway whereby the operationof said fan is effective to induce the flow of air through the inletpassageway and to forcibly propel the flow of air through the outletpassageway While the said heater is effective to elevate the temperatureof the air in its movement through the unit.

5. An air heater unit comprising, a housing, a baffle disposedinteriorly of said housing, a divider sleeve disposed intermediate thebaffle tube and said housing, said baffle tube being closed to preventthe flow of air therethrough, and said divider sleeve and baffle tubebeing spaced apart to define a discharge passageway therethrough, amotor mounted above the upper end of said divider sleeve, a plurality offan blades secured to said motor and adapted to force air downward- 1ythrough said discharge passageway, said baffie tube being rigidlysecured to said divider sleeve and carried thereby, the divider sleevebeing releasably secured to the housing whereby the motor, fan blades,divider sleeve and baille tube are detachable as a unit from thehousing.

6. A ceiling heater unit comprising, a housing, a baille tube disposedwithin said housing, said bafile tube being sealed to prevent the flowof air therethrough, a divider sleeve disposed intermediate the baffletube and said housing, the space defined by said divider sleeve and saidbaffle tube constituting a discharge passageway, a plurality of airdirecting vanes fixedly mounted within said discharge passageway, a bandadapted to fit over said divider sleeve, a plurality of brackets carriedby said band and extending inwardly therefrom, a heating element, saidheating element being clamped above said brackets and below said vanes,and a fan having a plurality of blades adapted to force air downwardlythrough said discharge passageway, whereby a column of warm air isforced from said unit.

7. A ceiling heater unit comprising a housing, a baffle tube disposedwithin said housing, said baffle tube being sealed to prevent the flowof air therethrough, a divider sleeve disposed intermediate the bafiletube and said housing, the space defined by said divider sleeve and saidbaffle tube constituting a dis-charge passageway, a

plurality of air directing vanes disposed within said dischargepassageway in substantially parallel relation to the axis thereof, aheating element disposed within said discharge passageway at one end ofsaid vanes, a fan at the other end of said vanes, said fan having aplurality of blades adapted to force air downwardly through saiddischarge passageway whereby the air is forced in an annular column fromsaid unit.

8. A ceiling heater unit comprising a cylindrical housing, a baffle tubedisposed within said housing concentrically therewith, said bafiie tubebeing sealed to prevent the fiow of air therethrough, a divider sleevedisposed intermediate the battle tube and said housing, the upper edgesof said divider tube and bafiie sleeve being spaced downwardly from saidhousing, the space defined by said divider sleeve and said baiile tubeconstituting a discharge passageway, the space defined by said housingand said divider sleeve con stituting an inlet passageway, a fandisposed within said housing above said baiile tube, said fan includinga plurality of elongate arms, angulated blades mounted adjacent the endof said arms and disposed for rotation within said discharge passageway,so that said fan is eifective to force air downwardly through saiddischarge passageway at a relatively high velocity.

9. A ceiling heater unit comprising a cylindrical housing, a baffle tubedisposed interiorly of said housing concentrically therewith, a dividersleeve interposed intermediate the baffle tube and said housing, saidbaffle tube being sealed to prevent the flow of air therethrough, saiddivider sleeve and baffle tube forming a discharge passagewaytherebetween, said baffle tube and said housing forming an inlet passagetherebetween, a plurality of air directing vanes secured to said baffletube and said divider sleeve and disposed within said dischargepassageway, said baffie tube being supported by said vanes, a pluralityof feet secured to the interior of said housing, a like plurality ofco-operating members secured to said divider sleeve and disposed forengagement with said feet, means for releasably securing saidcooperating members and said feet to support said divider sleeve withinthe housing, a fan disposed within said housing, said fan being carriedby said divider sleeve, a heating element disposed within said dischargepassageway, and means associated with said divider sleeve for supportingsaid heating element.

10. A ceiling heater unit comprising a cylindrical housing, a bafiletube disposed interiorly of said housing concentrically therewith, adivider sleeve interposed intermediate the baflie tube and said housing,said bafiie tube being sealed to prevent the flow of air therethrough,said divider sleeve and baffle tube forming a discharge passagewaytherebetween, said baiiie tube and said housing forming an inlet passagetherebetween, a plurality of air directing vanes secured to said baiiietube and said divider sleeve and disposed within said dischargepassageway, said bafile tube being supported by said vanes, a pluralityof feet secured to the interior of said housing, a like plurality ofco-operating members secured to said divider sleeve and disposed forengagement with said feet, means for releasably securing saidco-operating members and said feet to support said divider sleeve withinthe housing, a fan disposed within said housing, said fan being carriedby said divider sleeve, a heating element disposed within said dischargepassageway, and means associating with said divider sleeve forsupporting said heating element, said means including a band, aplurality of brackets extending inwardly from said band, means forreleasably securing said band to said divider sleeve, said bracketsbeing disposed beneath said heating coil in engagement therewith.

11. A ceiling heater unit comprising a cylindrical housing, a battletube disposed interiorly of said housing concentrically therewith, adivider sleeve interposed intermediate the bafiie tube and said housing,said baffle tube being sealed to prevent the flow of air therethrough,said divider sleeve and baflie tube forming a discharge passagewaytherebetween, said baflie tube and said housing forming an inlet passagetherebetween, a plurality of air directing vanes secured to said baflietube and said divider sleeve and disposed within said dischargepassageway, said bafile tube being supported by said vanes, a pluralityof feet secured to the interior of said housing, a like plurality ofco-operating members secured to said divider sleeve and disposed forengagement with said feet, means for releasably securing saidco-operating members and said feet to support said divider sleeve withinthe housing, a fan disposed within said housing, said fan being carriedby said divider sleeve, a heating element disposed within said dischargepassageway, and means associating with said divider sleeve forsupporting said heating element, said means including a band, aplurality of brackets extending inwardly from said band, means forreleasably securing said band to said divider sleeve, said bracketsbeing disposed beneath said heating coil in engagement therewith, saidbrackets, said heating coil and said air directing vanes being disposedso that said coil is clampingly engaged between said brackets and saidvanes.

References Cited in the file of this patent UNITED STATES PATENTS Number

